Excitation of fullerene ions during grazing scattering from a metal surface
- Institut fuer Physik, Humboldt-Universitaet zu Berlin, Brook-Taylor-Strasse 6, D-12489 Berlin (Germany)
Angular distributions, fragmentation, and charge fractions are studied for grazing scattering of C{sub 60}{sup +} fullerenes with keV energies from a clean and flat Al(001) surface. At low energies for the motion along the surface normal, C{sub 60}{sup +} ions are scattered nearly elastically, whereas for larger normal energies energy loss is substantial. We compare our experimental results with classical trajectory simulations exploiting the Tersoff potential between atoms in the cluster and different types of interaction potentials for the cluster with the surface. The internal energy of scattered clusters is deduced from the analysis of fragments. We observe that the loss of kinetic energy for the motion along the surface normal is transferred to internal excitations of the cluster, whereas the energy transfer to the metal surface is negligible. The charge state distributions for scattered projectiles can be understood by a full neutralization of incident ions at the surface and subsequent delayed electron emission.
- OSTI ID:
- 21020529
- Journal Information:
- Physical Review. A, Vol. 76, Issue 3; Other Information: DOI: 10.1103/PhysRevA.76.032901; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
ANGULAR DISTRIBUTION
ATOMS
CATIONS
CHARGE STATES
COMPARATIVE EVALUATIONS
ELASTIC SCATTERING
ELECTRON EMISSION
ENERGY LOSSES
ENERGY TRANSFER
EXCITATION
FRAGMENTATION
FULLERENES
KEV RANGE
KINETIC ENERGY
MOLECULAR IONS
PARTICLES
SCATTERING
SIMULATION
SURFACES